CN102399451A - Method for extracting pigment from persimmon peel - Google Patents
Method for extracting pigment from persimmon peel Download PDFInfo
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- CN102399451A CN102399451A CN2010102820539A CN201010282053A CN102399451A CN 102399451 A CN102399451 A CN 102399451A CN 2010102820539 A CN2010102820539 A CN 2010102820539A CN 201010282053 A CN201010282053 A CN 201010282053A CN 102399451 A CN102399451 A CN 102399451A
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- pigment
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Abstract
The invention relates to a method for extracting pigment, more specifically relates to a method for extracting pigment from persimmon peel, which belongs to the food chemical technical field. According to the invention, a 95% ethanol solution with pH value of 3 is taken as an extractant for extracting haematochrome in the persimmon peel, a 120# solvent naphtha is added in an extract to separate flavochrome and haematochrome, extraction of the pigment and recovery of a solvent can be respectively carried out. The preparation method has the advantage of simple process, the 95% ethanol solution with pH value of 3 is taken as the extractant for extracting haematochrome in the persimmon peel, the haematochrome can be used as a food additive in food industry and can also be prepared to a semi-finished product for directly using in industrial production, the production cost is greatly reduced. The slag of the extracted pigment can be used as feeds, the appearance of the persimmon haematochrome has the characteristics of magenta color, powder, no odor, non toxicity, no medical residue during the preparation process, natural color tone and good stability.
Description
Technical field
The present invention relates to a kind of method of extracting pigment, be specifically related to a kind of preparation method who from the persimmon skin, extracts pigment, belong to the food chemical technology field.
Background technology
At present, at food-processing industry, for the color, smell and taste that keep food and fresh-keeping, use various pigments in a large number, because the synthetic colour ubiquity toxicity problem, in today of paying attention to food safety, synthetic colour can't satisfy the demand in market.From the edible natural animal and plant, propose natural pigment, become the direction of foodstuff additive industrial development.
Summary of the invention
The objective of the invention is for overcoming the weak point of above-mentioned prior art; A kind of preparation method who from the persimmon skin, extracts pigment is provided; It is that 3 95% ethanolic soln is extraction agent that this method is utilized pH, and red pigment in the persimmon skin is extracted, and extraction liquid is added the 120# solvent oil; Yellow pigment is separated with red pigment, carry out the extraction of pigment and the recovery of solvent more respectively.Can pigment in the persimmon skin be extracted, be applied in the foodstuffs industry, also can be made into work in-process and directly be used for industrial production, can reduce production costs as foodstuff additive.Slag use capable of using as feed behind the extraction pigment, persimmon red pigment outward appearance is red-purple, and is Powdered, free from extraneous odour is nontoxic, drug residue free in the preparation process, tone nature, good stability.
The present invention realizes with following technical scheme: a kind of preparation method who from the persimmon skin, extracts pigment; It is characterized in that: it is that 3 95% ethanolic soln is extraction agent that this method is utilized pH; Red pigment in the persimmon skin is extracted, extraction liquid is added the 120# solvent oil, yellow pigment is separated with red pigment; Carry out the extraction of pigment and the recovery of solvent more respectively, specifically comprise the steps:
(1) extracting process: take by weighing 10g persimmon skin; Clean up with distilled water; Be slit into little bulk (or pulverizing); Be put in the 250mL round-bottomed flask; Adding 200mL pH is 3 95% ethanolic solution, loads onto reflux condensing tube, the water-bath heating; Keep the solution state that closely boils; The extraction time is 1.-2h, and the solution after the extraction is poured in the beaker, and above-mentioned persimmon skin is used the same method; Re-extract 4-6 time; Preceding twice solution of extraction is merged placement sedimentation 8～10h, and normal pressure filters then, removes sediments such as pectin; Filtrating with after several times extract merge, subsequent use;
(2) pigment separates: the filtrating of step (1) is poured in the separatory funnel; The 120# solvent naphtha that adds equal volume amounts fully vibrates, and standing demix, upper strata liquid are the uranidin of solvent naphtha extraction; Subnatant is the haematochrome solution of alcoholic extract, with separatory funnel two-phase is separated;
(3) recovery of solvent: the red solution 100mL that gets alcoholic extract adds 10mL zero(ppm) water again in flask, add several zeolites; Carry out underpressure distillation after loading onto the air distillation of water distilling apparatus elder generation; Reclaim ethanolic soln, red material vacuum-drying in the flask is pulverized and is the red pigment product; Extracting yellow cellulose solution 100mL adds several zeolites in flask, load onto water distilling apparatus and carry out underpressure distillation, reclaims the 120# solvent oil, when the residue small amount of liquid, carries out vacuum-drying again, pulverizes and is the yellow pigment product.
Advantage of the present invention is: this preparing method's technology is simple; Using pH is that 3 95% ethanolic soln is extraction agent, can pigment in the persimmon skin be extracted, and is applied in the foodstuffs industry as foodstuff additive; Also can be made into work in-process and directly be used for industrial production, can reduce production costs.Slag use capable of using as feed behind the extraction pigment, persimmon red pigment outward appearance is red-purple, and is Powdered, free from extraneous odour is nontoxic, drug residue free in the preparation process, tone nature, good stability.
Embodiment
Embodiment,
(1) extracting process: take by weighing 10g persimmon skin; Clean up with distilled water; Be slit into little bulk (or pulverizing); Be put in the 250mL round-bottomed flask; Adding 200mL pH is 3 95% ethanolic solution, loads onto reflux condensing tube, the water-bath heating; Keep the solution state that closely boils; The extraction time is 1.-2h, and the solution after the extraction is poured in the beaker, and above-mentioned persimmon skin is used the same method; Re-extract 4-6 time; Preceding twice solution of extraction is merged placement sedimentation 8～10h, and normal pressure filters then, removes sediments such as pectin; Filtrating with after several times extract merge, subsequent use;
(2) pigment separates: the filtrating of step (1) is poured in the separatory funnel; The 120# solvent naphtha that adds equal volume amounts fully vibrates, and standing demix, upper strata liquid are the uranidin of solvent naphtha extraction; Subnatant is the haematochrome solution of alcoholic extract, with separatory funnel two-phase is separated;
(3) recovery of solvent: the red solution 100mL that gets alcoholic extract adds 10mL zero(ppm) water again in flask, add several zeolites; Carry out underpressure distillation after loading onto the air distillation of water distilling apparatus elder generation; Reclaim ethanolic soln, red material vacuum-drying in the flask is pulverized and is the red pigment product; Extracting yellow cellulose solution 100mL adds several zeolites in flask, load onto water distilling apparatus and carry out underpressure distillation, reclaims the 120# solvent oil, when the residue small amount of liquid, carries out vacuum-drying again, pulverizes and is the yellow pigment product.
Claims (1)
1. preparation method who from the persimmon skin, extracts pigment; It is characterized in that: it is that 3 95% ethanolic soln is extraction agent that this method is utilized pH; Red pigment in the persimmon skin is extracted, extraction liquid is added the 120# solvent oil, yellow pigment is separated with red pigment; Carry out the extraction of pigment and the recovery of solvent more respectively, specifically comprise the steps:
(1) extracting process: take by weighing 10g persimmon skin; Clean up with distilled water; Be slit into little bulk (or pulverizing); Be put in the 250mL round-bottomed flask; Adding 200mL pH is 3 95% ethanolic solution, loads onto reflux condensing tube, the water-bath heating; Keep the solution state that closely boils; The extraction time is 1.-2h, and the solution after the extraction is poured in the beaker, and above-mentioned persimmon skin is used the same method; Re-extract 4-6 time; Preceding twice solution of extraction is merged placement sedimentation 8～10h, and normal pressure filters then, removes sediments such as pectin; Filtrating with after several times extract merge, subsequent use;
(2) pigment separates: the filtrating of step (1) is poured in the separatory funnel; The 120# solvent naphtha that adds equal volume amounts fully vibrates, and standing demix, upper strata liquid are the uranidin of solvent naphtha extraction; Subnatant is the haematochrome solution of alcoholic extract, with separatory funnel two-phase is separated;
(3) recovery of solvent: the red solution 100mL that gets alcoholic extract adds 10mL zero(ppm) water again in flask, add several zeolites; Carry out underpressure distillation after loading onto the air distillation of water distilling apparatus elder generation; Reclaim ethanolic soln, red material vacuum-drying in the flask is pulverized and is the red pigment product; Extracting yellow cellulose solution 100mL adds several zeolites in flask, load onto water distilling apparatus and carry out underpressure distillation, reclaims the 120# solvent oil, when the residue small amount of liquid, carries out vacuum-drying again, pulverizes and is the yellow pigment product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102820539A CN102399451A (en) | 2010-09-08 | 2010-09-08 | Method for extracting pigment from persimmon peel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102820539A CN102399451A (en) | 2010-09-08 | 2010-09-08 | Method for extracting pigment from persimmon peel |
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| CN102399451A true CN102399451A (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102820539A Pending CN102399451A (en) | 2010-09-08 | 2010-09-08 | Method for extracting pigment from persimmon peel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103804945A (en) * | 2014-01-24 | 2014-05-21 | 武汉市林业果树科学研究所 | Extraction method of black persimmon peel pigment |
| CN104559304A (en) * | 2014-12-19 | 2015-04-29 | 桂林得坤生物科技股份有限公司 | Method for extracting pigment in persimmon |
-
2010
- 2010-09-08 CN CN2010102820539A patent/CN102399451A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103804945A (en) * | 2014-01-24 | 2014-05-21 | 武汉市林业果树科学研究所 | Extraction method of black persimmon peel pigment |
| CN103804945B (en) * | 2014-01-24 | 2015-05-27 | 武汉市林业果树科学研究所 | Extraction method of black persimmon peel pigment |
| CN104559304A (en) * | 2014-12-19 | 2015-04-29 | 桂林得坤生物科技股份有限公司 | Method for extracting pigment in persimmon |
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Application publication date: 20120404 |